Chethan Kumar Profile picture
Apr 1 13 tweets 4 min read Twitter logo Read on Twitter
#Thread #Space

@isro, as part of plans to expand its ground station network, plans to build one in French Guiana. According to Isro, “technical discussion on establishing” the stn is on with CNES, ties with whom has expanded beyond EO to include human spaceflight & SSA. 1/n
A senior Isro scientist said: “This will be what we call a gateway station, which will be used to link the proposed Indian Data Relay Satellites (IDRS). We’ve made the proposal and the site has been identified by our partners in France… 2/n
…Acquisition of required permissions & other processes are ongoing. While the first major use case for the stn could be #Gaganyaan, this will have benefits for all future telemetry & tracking ops, monitoring of LV during launches, data downloading data from EO sats etc.” 3/n
This project is being enabled by the department of space (DoS) and Isro’s international cooperation with France. As on date, India, through DoS and Isro has signed space cooperative documents with space agencies of 61 countries. 4/n
“In order to intensify the existing space relations and also to establish new relations with other nations in the peaceful uses of outer space, 12 cooperative documents with foreign entities were signed during April 2022 and March 2023,” Isro said. 5/n
Some key agreements are: Aerosol and greenhouse gases monitoring (UAE); establishing and operating transportable telemetry terminals for Gaganyaan (Australia); deep space network for Chandrayaan-3 (US); space situational awareness (US & France) etc. 6/n
As part of the cooperation with France, Isro-CNES have signed an agreement on HSP under which Indian flight surgeons and ground support technicians had undergone specific training at CNES, Toulouse, France, and at Astronaut Training Centre, Cologne, Germany. 7/n
An Isro team also participated in the debriefing session of an ESA (European Space Agency) astronaut who returned from ISS. 8/n
“Wind tunnel testing of #Gaganyaan crew module & crew escape system is progressing at Glavkosmos with three models supplied by Isro. Discussion has progressed with respect to establishment of #NavIC reference station in Russia & GLONASS reference station in India,” Isro said. 9/n
Aside from this, India-Japan cooperation is currently focusing on lunar exploration, satellite navigation, and earth observation. Isro and Jaxa (Japanese space agency) are specifically working on completing the phase-A study of the joint lunar polar exploration mission... 10/n
…finalising instruments on lander & rover, sharing earth observation data for agro-meteorology products and rice crop monitoring; and establishing Indian Regional Navigation Satellite System’s (IRNSS) NavIC Navigation with Indian Constellation) reference station in Japan. 11/n
“Cooperation with ESA has been enhanced from earth observation and space exploration domains to other areas. Cooperative documents were signed for Network and Operations Cross-support and also for ESA’s ground station support for Chandrayaan-3 and Aditya-L1 missions… 12/n
…Both sides have agreed to conduct calibration testing of the NavIC - Galileo timing receiver at the ESA facility to estimate the time offset,” Isro said. n/n

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More from @Chethan_Dash

Feb 4
#Thread #Space #UPDATE 

@isro has officially said the NASA-Isro SAR (#NISAR), a LEO observatory being jointly developed with @NASA “shall be launched from Indian soil in Q1 of 2024”, and its science operations will begin 90 days after it reaches the intended orbit. 1/n

Pic: JPL
The synthetic aperture radar (SAR) payloads mounted on integrated radar instrument structure (IRIS) and the spacecraft bus are together called an observatory. 2/n
The observatory will map the entire globe in 12 days & provide spatially & temporally consistent data for understanding changes in Earth’s ecosystems, ice mass, vegetation biomass, sea-level rise, groundwater & natural hazards - earthquakes, tsunamis, volcanoes & landslides. 3/n
Read 19 tweets
Jan 27
#Update (2) #Space #Thread

@isro’s latest rocket, #SSLV, is geared for launch with the space agency aiming for an early Feb launch carrying three payloads. While the main payload will be #EOS7, the mission is also expected to launch #Janus1 from US' Antaris & an Indian sat. 1/n
The Earth observation satellite #SSLV is scheduled to carry will be in the small satellite class with its mass not exceeding 200kg, while the other two satellites sharing the ride will be smaller. 2/n
#SSLV can launch around 500kg sat in a 500km planar orbit and its key features — low cost, low turn-around time, flexibility to launch multiple sats, launch-on-demand, minimal infra requirements, etc,. — can make it a go-to LV for commercial launches in the future. 3/n
Read 10 tweets
Jan 26
#Updates #Space #Thread

Had to be away. But here are some developments. More to follow later this evening or early tomorrow.

First, the #RLVTDLEX date will be fixed after the lifting trial is done. Isro will use Chinook as opposed to Mi17 as planned earlier. 1/n Image courtesy: @isro
@isro, which has received a key payload #VELC for #AdityaL1 today, has completed survey and radiation studies at Fiji Islands for a temporary station being designed specifically for the Solar mission, while exploration of other sites is ongoing. 2/n
Fiji Islands is one of the options being explored to support the observatory-class space-based solar mission wherein the spacecraft will be placed in a halo orbit around L1. A final decision on location will be taken later based on the exact mission profile of the mission. 3/n
Read 12 tweets
Dec 9, 2022

@isro completed the first blow down test of the newly installed Trisonic Wind Tunnel at the Vikram Sarabhai Space Centre (VSSC), the space agency’s lead rocket-building agency, on Thursday. 1/n
Trisonic Wind Tunnel is a system to aid aerodynamic design of rockets and re-entry spacecrafts by characterising a scaled model by evaluating forces, moments, load distribution, unsteady pressures, acoustic levels etc. 2/n
Arguing that this is a major step towards India’s increasing self-reliance in the aerospace sector, Isro said: “The tunnel has an overall length of about 160m and has a maximum cross section of 5.4m… 3/n
Read 9 tweets
Dec 7, 2022
#Thread #Space #India

In line with its renewed mandate to hand hold and encourage private industry, @isro and @SocialAlphaIN have launched a new innovation platform for the space sector: SpaceTech Innovation Network or #SpIN. 1/n Image
This is India’s first dedicated platform for innovation curation & venture development for space entrepreneurial ecosystem. 2/n
“A one-of-its-kind public-pvt collaboration for space startups, SMEs, #SpIN is a step in providing stimulus to India’s space reform policies & will work towards identifying & unleashing mkt potential of most promising space tech innovators & entrepreneurs,” Isro said. 3/n
Read 10 tweets
Nov 28, 2022
#Breaking #Stars #Galaxies #Thread

Today, @RRI_Bangalore (in pic) said in a first-of-its-kind work, using data from an Indian telescope, scientists have determined properties of radio luminous galaxies formed just 200-mn yrs after #BigBang — a period known as #CosmicDawn. 1/n
Pointing out that telescopes, both ground and space-based, are aiming to capture faint signals from the depths of the cosmos to better the understanding of our Universe, RRI said they used the Shaped Antenna measurement of the background RAdio Spectrum-3 (#SARAS3) telescope. 2/n
For the study, SARAS-3, indigenously designed and built at RRI, was deployed over Dandiganahalli Lake and Sharavathi backwaters, located in Karnataka, in early 2020 (see pic). 3/n
Read 23 tweets

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